<template>
  <!-- v-if保证数据请求回来后再做渲染，避免出现undefine以及闪烁问题 -->
	<view v-if="goods_info.goods_name" class="goods_detail">
    <!-- 轮播图区域 -->
		<swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true" indicator-active-color="white" indicator-color="#abaca6">
      <swiper-item v-for="(item,index) in goods_info.pics" @click="preview(index)">
        <image :src="item.pics_big_url"></image>
      </swiper-item>
    </swiper>
    
    <!-- 商品信息区域 -->
    <view class="goods-info">
      <!-- 商品价格 -->
      <view class="price">￥{{goods_info.goods_price}}</view>
      <!-- 商品描述 -->
      <view class="goods-desc">
        <!-- 商品名称 -->
        <view class="goods-name">{{goods_info.goods_name}}</view>
        <!-- 收藏 -->
        <view class="collect">
          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!-- 运费 -->
      <view class="move-price">运费：免运费</view>
    </view>
    
    <!-- 商品详情区域 -->
    <rich-text :nodes="goods_info.goods_introduce"></rich-text>
    
    <!-- 底部商品导航 -->
    <view class="goods-nav">
      <uni-goods-nav :fill="true"  :options="options" :buttonGroup="buttonGroup"  @click="onClick" @buttonClick="buttonClick" />
    </view>
	</view>
</template>

<script>
  import {mapMutations,mapGetters} from 'vuex'
	export default {
		data() {
			return {
				// 商品详情信息
        goods_info:{},
        // 商品导航区域
        options: [{
        			icon: 'shop',
        			text: '店铺',
        			infoBackgroundColor:'#007aff',
        			infoColor:"red"
        		}, {
        			icon: 'cart',
        			text: '购物车',
        			info: 0
        		}],
        	    buttonGroup: [{
        	      text: '加入购物车',
        	      backgroundColor: '#ff0000',
        	      color: '#fff'
        	    },
        	    {
        	      text: '立即购买',
        	      backgroundColor: '#ffa200',
        	      color: '#fff'
        	    }
        	    ]
			};
		},
    computed:{
      ...mapGetters('m_cart',['total'])
    },
    watch:{
      total:{
        // 页面一加载，就进行监听，使得页面加载，购物车数量红圆点进行显示
        immediate:true,
        handler(newValue) {
          // 使购物车对应图标数量进行相应变化
          const findResult = this.options.find(item => item.text==='购物车')
          if(findResult) {
            findResult.info=newValue
          }
        }
      }
    },
    onLoad(options) {
      // 获取页面传递过来的参数
      const goods_id = options.goods_id
      // 调用获取商品详情的函数
      this.getGoodsDetail(goods_id)
    },
    methods:{
      // 展开vuex中cart模块的方法
      ...mapMutations('m_cart',['addToCart']),
      // 获取商品详细信息
      async getGoodsDetail(goods_id) {
        const {data:res} = await uni.$http.get('/api/public/v1/goods/detail',{goods_id})
        if(res.meta.status !== 200) return uni.$showMsg()
        // 解决详情信息照片之间存在的空隙+ios系统照片适配
        res.message.goods_introduce = res.message.goods_introduce.replace(/<img/g,'<img style="display:block"').replace(/webp/g,'jpg')
        this.goods_info = res.message
      },
      preview(index) {
        uni.previewImage({
          current:index,
          urls:this.goods_info.pics.map(item => item.pics_big_url)
        })
      },
      onClick(e) {
        if(e.content.text==='购物车') {
          uni.switchTab({
            url:'/pages/cart/cart'
          })
        }
      },
      buttonClick(e) {
        // 判断用户点击的是否为加入购物车
        if(e.content.text === '加入购物车') {
          // 传递商品信息对象：{ goods_id, goods_name, goods_price, goods_count, goods_small_logo, goods_state }
          const goods = {
            goods_id:this.goods_info.goods_id,
            goods_name:this.goods_info.goods_name,
            goods_price:this.goods_info.goods_price,
            goods_count:1,
            goods_small_logo:this.goods_info.goods_small_logo,
            goods_state:true
          }
          this.addToCart(goods)
        }
      }
    }
	}
</script>

<style lang="scss">
swiper {
  height: 750rpx;
  image {
    width: 100%;
    height: 100%;
  }
}

.goods-info {
  padding: 10px;
  padding-right: 0;
  .price {
    font-size: 18px;
    color: #C00000;
    margin: 10px 0;
  }
  .goods-desc {
    display: flex;
    justify-content: space-between;
    .goods-name {
      font-size: 13px;
      padding-right: 10px;
    }
    .collect {
      width: 120px;
      font-size: 12px;
      color: gray;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      border-left: 1px solid #efefef;
    }
  }
  .move-price {
    margin: 10px 0;
    font-size: 12px;
    color: gray;
  }
}
.goods-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
}
.goods_detail {
  padding-bottom: 50px;
}
</style>
